Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff0ffefea6b3bcac…

MALICIOUS

PDF

70.7 KB Created: 2021-06-09 08:51:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1bf670c3b98f4406b361974298fc8727 SHA-1: cccfb03fc3e92e2df6e3d7d739112891b5cb5623 SHA-256: ff0ffefea6b3bcace917e94dd68a5cc680453ee8a8ea40fba34d11f72c99e475
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://infrive.ru/pbw?utm_term=free+to+play+battle+royale+games+on+steam PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426425/normal_6011220f02c02.pdfIn PDF document text
    • https://muvaxajipafe.weebly.com/uploads/1/3/5/3/135313420/1329852.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4468553/normal_60b1dd4ba56b0.pdfIn PDF document text
    • https://rororejiwep.weebly.com/uploads/1/3/5/9/135966539/2683943.pdfIn PDF document text
    • https://wazijewafaset.weebly.com/uploads/1/3/4/4/134437152/9ad0a133.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386087/normal_606af3f0dd268.pdfIn PDF document text
    • https://kapofered.weebly.com/uploads/1/3/2/6/132680839/lugudov.pdfIn PDF document text
    • https://dorizusedi.weebly.com/uploads/1/3/0/7/130776489/492922.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4454286/normal_60b645618511b.pdfIn PDF document text
    • https://jitobogi.weebly.com/uploads/1/3/7/5/137505353/1319105.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485457/normal_5ff28e421c385.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/57048c96-af7f-4023-a849-2654bd7d8ba5/99_polaris_xplorer_400_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/405488aa-f88e-43e8-871f-f2383acafc90/un_metro_cubico_de_arena_cuantos_kilos_son.pdfIn PDF document text
    • http://liwuvedesisu.pbworks.com/w/file/fetch/144492423/ganapiku.pdfIn PDF document text
    • http://bujolajoxek.pbworks.com/w/file/fetch/144868296/how_to_come_up_with_a_beachbody_team_name.pdfIn PDF document text
    • http://natofuke.pbworks.com/w/file/fetch/144834798/cabala_e_antroposofia.pdfIn PDF document text
    • http://mumubib.pbworks.com/f/africas_hidden_history.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7e52fdb-ce6d-459f-8405-7d2dad076747/what_do_we_need_to_write_an_article.pdfIn PDF document text
    • http://sodopateduke.pbworks.com/w/file/fetch/144426267/muginaderomififuse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf33ba5c-e51a-4a12-837d-76519b9f356c/how_to_extract_pages_from_a_without_acrobat.pdfIn PDF document text
    • http://jujirafamena.pbworks.com/f/corey_theory_and_practice_of_counseling_and_psychotherapy.pdfIn PDF document text
    • http://kipizasuzeda.pbworks.com/w/file/fetch/144414363/samuberu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7FD 5336 bytes
SHA-256: ced3f7deb15803b7f2832ab1239fdf779813335f13ce8c0835bd4cd8beb07eb7
font_01_sfnt_off0000ea19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA19 10300 bytes
SHA-256: ad90128045305211658e7ad746ae4c8d756bf40fa5eb6dab133abe50fad69ecd

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